工艺参数对CRI削减雨水径流中氮磷污染物的影响  

Effect of Technological Parameters on Nitrogen and Phosphorus Pollutants Reduction in Stormwater Runoff by CRI Process

作　　者：王沐晴 卞兆勇[2] 张丹丹 闫燕军 王辉[1] WANG Muqing;BIAN Zhaoyong;ZHANG Dandan;YAN Yanjun;WANG Hui(School of Environmental Science and Engineering,Beijing Forestry University,Beijing 100083,China;College of Water Sciences,Beijing Normal University,Beijing 100875,China)

机构地区：[1]北京林业大学环境科学与工程学院,北京100083 [2]北京师范大学水科学研究院,北京100875

出　　处：《净水技术》2021年第10期122-130,共9页Water Purification Technology

基　　金：国家水体污染控制与治理科技重大专项(2018ZX07101005)。

摘　　要：为强化人工快速渗滤(CRI)系统对雨水径流中氮磷等污染物的净化能力,对水力负荷、介质层厚度和进水方式3个工艺参数进行优化。小试试验结果表明,当水力负荷为2 m/d、介质层厚度为70~100 cm时,在介质层表面和距表面30 cm处以2∶1同时进行分段进水,CRI系统对氮磷等污染物的净化能力最好。最佳运行条件下,系统对COD、TP、氨氮和TN的去除率分别为87.7%、90.1%、89.5%和40.5%。中试试验结果表明,CRI系统在上述运行条件下具有一定的稳定性和耐冲击负荷的能力,适用于对雨水径流的处理。研究结果可以为CRI系统的应用提供一定的理论支撑。To enhance the purification capacity of constructed rapid infiltration(CRI)system for nitrogen,phosphorus,and other pollutants removal in stormwater runoff,hydraulic load,medium layer thickness and influent mode were optimized.Small-scale bench test showed that when hydraulic load was 2 m/d,thickness of medium layer was 70~100 cm,and the same time,rainwater was fed from medium layer surface and 30 cm below the surface with 2∶1,respectively,CRI system had the best purification capacity of contaminants removal.Under the optimal condition,the removal rates of COD,TP,ammonia nitrogen and TN in this system were 87.7%,90.1%,89.5%and 40.5%,respectively.Pilot scale test showed the CRI system had a good stability and could resist to impact under the condition,which was suitable for the treatment of stormwater runoff.This study may provides theoretical support for the application of CRI process.

关 键 词：人工快速渗滤 氮 磷 工艺参数 雨水径流 

分 类 号：TU992[建筑科学—市政工程]